Tag: nervous and endocrine system in humans

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Questions Related to nervous and endocrine system in humans

Multiple choice biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

Which of the following statements about 'neuro-hypophysis' is correct?

  1. It stores the hormones produced by adenohypophysis

  2. It is poorly developed and functionless in humans

  3. It stores and releases hormones secreted by hypothalamus

  4. It secretes its own hormones
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Neurohypophysis or the posterior lobe of pituitary gland consists of axonal endings of neurosecretory neurons located in hypothalamus. Oxytocin and vasopressin are the hormones secreted by hypothalamus but stored and released by neurohypophysis.

Multiple choice biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

A man is suffering from abnormally low body temperature, loss of appetite and extreme thirst. His brain scan is liable to show tumour in

  1. Pons

  2. Cerebellum

  3. Medulla oblongata

  4. Hypothalamus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Symptoms like abnormal body temperature, loss of appetite, and extreme thirst point to dysfunction in the hypothalamus, which regulates these homeostatic processes.

Multiple choice biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

Hypothalamus is not involved in

  1. Osmoregulation and thirst

  2. Temperature control

  3. Accuracy of muscular movement

  4. Sleep wake cycle
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The hypothalamus controls autonomic functions like temperature and thirst, but the cerebellum is responsible for the accuracy and coordination of muscular movement.

Multiple choice biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

Pituicytes are under the control of ____________.

  1. Adenohypophysis

  2. Hypothalamus

  3. Neurohypophysis

  4. Both (a) and (c)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pituicytes are the cells found in the posterior lobe of pituitary gland. The hormones, oxytocin and vasopressin released by pituicytes are actually produced by hypothalamus.

Multiple choice biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

Which is not an example of homologous structure

  1. Heterodont teeth in mammals

  2. different types of vertebrates

  3. Both

  4. None
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Heterodont teeth and different types of vertebrates are examples of homologous structures. The structure which are different in appearance and perform different functions but have similar structure and developmental origin are called homologous organs.

Multiple choice biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

Somatostatin is produced in.

  1. Adenohypophysis

  2. Neurohypophysis

  3. Pineal gland

  4. Basal part of diencephalon
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Somatostatin is produced from the hypothalamus(one part of the diencephalon) inhibits the pituitary gland's secretion of growth hormone and thyroid stimulating hormone. So, the correct answer is option D.

Multiple choice biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

Which is correct for Vasopressin

  1. It is a long peptide in nature

  2. It is also called as Diuretic hormone

  3. It is released from hypothalamus

  4. It is released from adrenal cortex
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Vasopressin is produced by the hypothalamus and is stored in the posterior lobe of the pituitary. It is also called an anti-diuretic hormone (ADH), as it acts on the kidney and promotes re-absorption of water from urine. Thus ADH constantly regulates the amount of water in blood and therefore play a key role in the maintenance of blood pressure.

So the correct answer is "It is released from hypothalamus"